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ADP CEO sells 29,810 shares in September 2026

ADP’s President & CEO reported 29,810 shares sold under a Rule 10b5-1 plan and a new 21,689-unit RSU award, alongside shares withheld for tax or exercise obligations.

Filing Impact
(Very High)
Filing Sentiment
(Very Negative)
Form Type
4

Rhea-AI Filing Summary

AUTOMATIC DATA PROCESSING INC (ADP) reported that President & CEO Maria Black executed a series of stock transactions in early September 2026. On September 2, she sold 29,810 shares of common stock in multiple open-market trades at prices between about $278.59 and $281.86, pursuant to a Rule 10b5-1 trading plan adopted in September 2025.

On September 1, she received a grant of 21,689 restricted stock units that vest ratably over three years on a one-for-one basis into common stock, and 31,215.462 shares were delivered or withheld to pay an exercise price or tax liability. Post-transaction share holdings are not stated in this report.

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Insider Black Maria
Role President & CEO
Sold 29,810 shs ($8.37M)
Type Security Shares Price Value
Sale Common Stock F2 214 $279.2119 $60K
Sale Common Stock F2 256 $279.4446 $72K
Sale Common Stock F2 559 $279.9339 $156K
Sale Common Stock F2 610 $281.8625 $172K
Sale Common Stock F2 700 $278.5886 $195K
Sale Common Stock F2 760 $281.6961 $214K
Sale Common Stock F2 786 $280.2682 $220K
Sale Common Stock F2 1,018 $281.5993 $287K
Sale Common Stock F2 1,018 $280.5952 $286K
Sale Common Stock F2 1,193 $280.9598 $335K
Sale Common Stock F2 1,483 $281.1319 $417K
Sale Common Stock F2 2,898 $279.7355 $811K
Sale Common Stock F2 7,724 $281.6597 $2.18M
Sale Common Stock F2 10,591 $280.8179 $2.97M
Grant/Award Common Stock F1 21,689 $0.00 $0.00
Exercise Price or Tax Liability Common Stock 31,215.462 $283.49 $8.85M
Holdings After Transaction: Common Stock — 80,624.172 shares (Direct)
Footnotes (2)
  1. F1. In the form of restricted stock units, which are convertible into common stock on a one-for-one basis and vest ratably over 3 years.
  2. F2. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025.
Shares sold 29,810 shares Total common shares sold on September 2, 2026 across 14 transactions
Sale price range $278.59–$281.86 per share Per-share prices for the September 2, 2026 open-market or private sales
RSUs granted 21,689 units Restricted stock units granted on September 1, 2026, one-for-one into common stock
RSU vesting period 3 years RSUs vest ratably over three years
Shares delivered or withheld 31,215.462 shares Code F transaction on September 1, 2026 for exercise price or tax liability
Code F price $283.49 per share Price used in the September 1, 2026 code F disposition
Rule 10b5-1 plan adoption September 2025 Plan under which the sale transactions on September 2, 2026 were effected
Sale transactions count 14 transactions Number of separate sale entries reported for September 2, 2026
Rule 10b5-1 trading plan regulatory
"transactions were effected pursuant to a Rule 10b5-1 trading plan"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
restricted stock units financial
"In the form of restricted stock units, which are convertible"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
Form 4 regulatory
"The transactions reported in this Form 4 were effected"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
vest ratably financial
"vest ratably over 3 years"
exercise price or tax liability financial
"Payment of exercise price or tax liability by delivering"

FAQ

What insider trading did ADP’s CEO report in this Form 4?
Maria Black, ADP’s President & CEO, reported selling 29,810 shares of common stock on September 2, 2026 in multiple open-market transactions, along with a new RSU grant and a share disposition for exercise price or tax obligations.

At what prices were ADP (ADP) shares sold by the CEO?
The reported sales on September 2, 2026 were made in multiple trades at per-share prices ranging from about $278.59 to $281.86, each described as a sale in open market or private transaction.

What RSU award did ADP’s CEO receive according to this Form 4?
On September 1, 2026, Maria Black acquired 21,689 restricted stock units, convertible into common stock on a one-for-one basis and set to vest ratably over three years.

Were the ADP CEO’s stock sales made under a Rule 10b5-1 trading plan?
Yes. The filing states that the reported sale transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025, and the plan status checkbox is affirmed.

What does the code F transaction for ADP’s CEO represent?
On September 1, 2026, the CEO reported a code F transaction where 31,215.462 shares were delivered or withheld at a price of $283.49 per share for payment of exercise price or tax liability by using shares.

Does the ADP Form 4 state the CEO’s holdings after these transactions?
No. For the reported transactions, the Form 4 does not provide a figure for total shares held after the transactions; those fields are left blank in the non-derivative tables.

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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Black Maria
(Last)(First)(Middle)
ONE ADP BOULEVARD
(Street)
ROSELAND NEW JERSEY 07068
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
AUTOMATIC DATA PROCESSING INC [ ADP ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
President & CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock09/01/2026A21,689(1)A$0.0000141,649.634D
Common Stock09/01/2026F31,215.462D$283.49110,434.172D
Common Stock09/02/2026S214(2)D$279.2119110,220.172D
Common Stock09/02/2026S256(2)D$279.4446109,964.172D
Common Stock09/02/2026S559(2)D$279.9339109,405.172D
Common Stock09/02/2026S610(2)D$281.8625108,795.172D
Common Stock09/02/2026S700(2)D$278.5886108,095.172D
Common Stock09/02/2026S760(2)D$281.6961107,335.172D
Common Stock09/02/2026S786(2)D$280.2682106,549.172D
Common Stock09/02/2026S1,018(2)D$281.5993105,531.172D
Common Stock09/02/2026S1,018(2)D$280.5952104,513.172D
Common Stock09/02/2026S1,193(2)D$280.9598103,320.172D
Common Stock09/02/2026S1,483(2)D$281.1319101,837.172D
Common Stock09/02/2026S2,898(2)D$279.735598,939.172D
Common Stock09/02/2026S7,724(2)D$281.659791,215.172D
Common Stock09/02/2026S10,591(2)D$280.817980,624.172D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. In the form of restricted stock units, which are convertible into common stock on a one-for-one basis and vest ratably over 3 years.
2. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025.
David Kwon (POA on File)09/03/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR